Signaling system.



U. E. BEACH.

SIGNALING SYSTEM. APPLICATION FILED HAYS, 1912. RENEWED JULY 211,078,985.

Patented Nov. 18, 1913.

. ing alarmsignals to a local fire bri nals can sans rarer CLARENCE E.BEACH, 0F BINGHAMTON, NEW YORK, ASSIGNOB, TO GEORGE O. KZNAPP, OF NEWYORK, N. Y.

SIGNALING SYSTEM.

To all whom it may concern:

Be it known that I, CLARENCE E. BEACH, of Binghamton, in the county ofBroome and State of New York, have invented certain new and usefulImprovements in Signaling vSystems, ofwhich the following is aspecification.

My invention relates to signaling systems and particularly to alarmsystems for protecting localized territory and for protectingbuildings,-such, for example, as factory buildings and factory premises,Systems of this kind are designed, primarily, for sendade and forwarning the occupants of a building or premises to escape. Such systemsare, however, modified so that testing or drill sigbe sent thereover toselectively control the various alarm devices. Usually, signalcontrolling mechanism is provided at each of a number of stations,together with a local alarm device and at some central point generalalarm mechanism is installed,

the local alarm devices serving to warn the occupants at various partsof the-building orpremises and the general alarm devices "serving tonotify the fire brigade and to even though some other station is at thesame direct them to the calling station. At each station switchmechanisms are also provided whereby the circuit conditions may be adjusted for selection of desired alarm devices. In the particular systemwhich my invention covers, adjustment can be made to cause sounding ofall the alarm mechanisms both localand general; to cause any one or allof the local alarm devices to be responsive and the general alarmmechanism to be silenced; or to cause response of only the general'alarmmechanism and silencing of all the local alarm devices. It is, however,very important that actual fire alarms should at all times takeprecedence over testing or drilling alarms, so that the fire brigadewill immediately be notified as soon as an alarm of fire is sent fromany station,

time using the system for testing or drill purposes.

Among the important objects of my invention are,'th erefore, to providea simplified system for an alarm of tire to cause sounding of all thelocal alarm devices and the general ,or fire brigade alarm devices; toprovide. a system which can be adjusted for. control ontesting purposesto select Serial No. 780,368.

either one or all of the local alarm devices and to exclude the general'alarm.mechanism; to provide a system which can be adjusted for testingor drill purposes to cause response only of the general alarm devicesand to silence all of the local. alarm devices; to provide suchcontrolling mechanism and arrangement in the system that whenever afirealarm is sent in from any station while drill signals are being sentfrom any other station, the fire alarm signals will not be interferedwith and the fire brigade will be accurately directed to the stationfrom which the fire alarm signals are being sent; to provide sucharrangement that whenever an alarm of fire is being sent from anystation even though a selective drill signal is being sent from anyother station, all the local alarm devices will give warning to theoccupants of the building or premises; and in general to provide asystem simple in mechanism and simple in cir- 'cuit arrangement andcontrol, which is especially adapted curately and etiiciently call anddirect the fire brigade and at the same time give ample warning totheoccupants throughout the building or premises to be protected.

Signaling systems for carrying out the general features of the systemforming the subject of my present application, namely, to assureresponse at all times of the general alarm mechanism and toinsuresounding atall times of all the local alarm devices, have beenheretofore proposed. In such systems, however, the signaling mechanismat each station was in the formof a non-interfercnce successive firealarm box in which two sets of springs, one for controlling the generalalarm mechanism circuit and the other for controlling the local alarmcircuits, both form part of the noninterference mechanism of the box,from which it results that the succession feature of each box comes intoplay when such box is pulled for a fire alarm at a time when another boxis set for selectively drilling the general or brigade alarm mechanism.The improvement of my present application is, however, particularlydesigned for utilizing non-successive signaling boxes at the variousstations, as, for example, those known in the art as sector boxes, whichare wound during the operation of pulling and which are capable ofrunning for a limited number Specification of Letters Patent. p t t 1,19 3, Application filed May, 6, 1912, Serial No. 695,345. Renewed July21, 1913.

for local protection to acof rounds only after such pulling. As in theprevious systems referred to, two sets of circuit controlling cont-actmechanism are provided, one for controlling the general alarm mechanismcircuit and the other for controlling the local alarm device circuit,but only the general alarm mechanism circuit controlling contacts havenon-interfer enc'e control so that when one station has been pulled forselective drill of .the general alarm mechanism and another station ispulled for 'fire alarm, the response "'of the general alarm mechanism tothe drilling station will not be interfered with, but the 5 fire alarmsignals will be accurately sent from the fire alarm calling station toall the local alarm devices, so that the fire bri ade can be directedaccurately and so that a l of the occupants will be warned.

The arrangement and operation of my improved system herein can beclearly understood by reference to the accompanying sheet of drawings onwhich is illustrated a system adapted to carry out the various featuresreferred to.

At each of the various stations A B C, etc, of the building or premisesto be covered, a local alarm device 9 is installed and at some centralpoint general alarm or brigade calling mechanism G andcurrent sources Sand S are installed. At each of the stations signal box mechanism isinstalled having referably sector 'drivin mechanism, the riving trainforthe signs wheel being-wound each time the tax pulled and when releasedbeing adapted to run to give the signal wheel a certain number of roundsand then to sto As indi cated, a pull lever a is connec with a sectorgear 6 and a spring 0 is provided to be lwound when the sector is swungdownwardly and to restore the sector when the pull lever is released. Asuitable driving train with interposed ratchet mechanism connectsbetween the sector gear and the signal wheel d, and transmits movementto the signal wheel only during return movement of the sector cam, thisarrangement being so well known in the art that it is decided not toshow it. Associated with the signal wheel rl are-two signaling levers eand f bo th pivoted at h and having the points z and 7', respectively,for engaging the signal wheel (Z to cooperate with the teeth and notchesthereof. 8| Lever e has the stud k cooperating with contact springs Zand m and lever f has a stud n for cooperating with contact springs 0and p.

A non-interferenceelectro-magnet E has an armature structure q pivotedat r and having -its'lower end s extending into the path of the pin tonthe sector gear I) so that when this sector gear is in normal condition,the armature will be held in attracted .ition and when the sector gearis starte downwardly .upon winding of the springvthe ar- -first time.The spun at the various stations control the circuits 'the local alarmdevice 9 at the last'station,

mature will be released to be free to retract, a spring u tending tomove the armature to retracted position. The armature lever car-- riesbelow its pivot point a pin U for coii'perating with the extended end ofthe signal ing lever e to move into position below this lever when thislever is raised and the ar mature structure retracted, or to be in frontof the pin 1; when the. lever is down. In other words, the pin '21 andlever a cooperate during the running of the box so that the ar-- maturestructure is free to retract (luring closures of springs Z and m by thelever 6, but is locked in attracted position by the lever e when thelever engages in notches of the signal wheel and the contact springs land m are open, this being a well known noninterference arrangement insignaling boxes to prevent the signaling operation of one box from beininterfered with by any box on the same line. The lever f has, however,no non-interference association with the armature structure and is atall times free to cause opening and closure of the springs 0 and 1)during operation of the signal wheel. As shown, each box mustalsoundergo a test period after being pulled and must run for a time longerthan the longest closure in any signal before the circuits controlled bythe springs l, m and o, p can be broken for the Z and m at the variousstations control t e circuits for the gen-- eral alarm devices G and theSprings 0 and 7) for the local alarm devices 9. 6

At each of the stations suitable switch mechanism is provided foradjusting the circuit conditions for selecting the various alarm devicesfor response. As shown, at each station two switch arms 5 and 6 areprovided and connected together for simultaneous operation by a bar 7.Switch arm 5 is adapted for connection with contacts 1, 2, 3, and 4 andswitch arm 6 is ada mad for con nection with contacts 1, 2', 3 and 4. Aconductor 8 connects the switch arm 5 at station A with one terminal ofbattery 5 and the conductor 9 connects the other terminal of thisbatterywith one terminal of in this case, station C. At each station theswitch arm 5 connects through conductor 10 with the signaling spring I,the associated spring we connecting with one terminal of the associatedelectro-magnet E, the other termi= nal of each electro-magnet connectingthrough conductor 11 with the switch arm 5 of the next station, untilthe last station is reached where the conductor'lQ connects the.electro-magnet with one terminal of the battcrv S',-the other terminalof this 7 connecting through conductor, 8 and the general alarmmechanisms G 171 h-thooonductor 8. At station A the switch Inns 5 and 6are connected together eon tion and 72 ductor l4 and are connected byconductor 15 with signaling spring 0, the associated spring 7)connecting through conductor 16 with the conductor 17 which connects oneterminal of the local alarm device 9 with contact at at station A. Theother terminal of each local alarm device connects through a conductorclearly understood. When the switch arms at the various stations are inengagement with thecontacts 1 and 1, respectively, the system is'innormal condition for fire alarm purposes-and the pulling of any box willresuit in response of all the local alarm devices and also the generalalarm devices, so that the the brigade is called to the signalingstation and all the occupants of the building or premises areduly warnedby the sounding of all the local alarm devices. During such normalcondition, we have the following closed circuit through the generalalarm devices :from battery .5" through the general alarm devices G,conductors 8 and 10, signaling springs Z and m, and the electro-magnet Estation E, thence through conductor 10,

springs Z and m and electro-magnet E at station '13, thence throughconductor 10, spring/5'1 and m and electro-magnet at stathen throughconductor 12 back to battery 8'. This general alarm circuitis thereforecontrolled by the opening and closure of the springs Z and m at anystation at which the box mechanism is ing also pulled. Dursuch normalconditions of the system we have the following closed circuit throughthe local alarm devices g:from

battery S through conductors 8, 14 and 15 and springs 0 and 79 atstation A and through conductor 16 and local alarm deviceg at saidstation; thence through con 'ductors 18 and 19 to station B andthroughsprings o and p and the local alarm'device at said station,thence through the springs 0 and local alarm device at station C andthen through conductor 9 back to battery S. This local alarm devicecircuit will therefore-be controlled by the springs 0 and p at anystation at which the box mechanism is pulled.

To illustrate the operation of the system under normal conditions,suppose that at any of thestations, for example, station A,

the box mechanism is pulled for an alarm of fire, and that no otherstations are operating at this time. The signal'wheelat station A --willopen and closethe springs 1,410 and at station A, conductor 11 to givenby 0, p, in accordance with the box signal, and the .box signal will besounded on the general alarm device through the circuit before tracedand will be sounded by all the local alarm devices through the circuitbefore traced. The 'fire brigade will therefore be called to station Aand the local alarm devices at all the stations will give warning to allthe occupants of the building or premises. If, after the box at stationA has been pulled, the box at another station as, for example, stationB, is pulled, station A will still retain full control 'of the generalalarm mechanism, and such control cannot be interfered with by theoperation of the box atstation B for the reason that when the box atstation B is pulled, the testperiod must first be gone through andduring this test period the general alarm mechanism circuit will beopened and the retracting armature at station B will lock the contactlever e at said station in raised position to keep contacts Z and mclosed. At station A, however, the armaturewill be held in attractedposition by the lever 6 when this lever is in its lower position to openthe circuit at its springs Z and m. The armature at station B uponretracting will be out of attractive range of its electro-magnet so thatthe signaling lever 6 will be locked in its upper position and springs Zand m will be held closed until the sector gear 11 returns to its normalposition and the pint on said gear engages end 8 of the armaturestructure to restore it to attracted position to thereby release thesignaling lever e, and this will only be after the box at station A hasfully concluded its operation and transmitted its full signal to thegeneral alarm mechanism. However, as the signaling levers f are notunder non-interference control, the springs 0 and p at station B will beopened and closed so that the local alarm circuit will be opened andclosed by the springs as well as-by these corresponding springs atstation A. All the local alarms will therefore respond but may not givestation A signal. However, as the main pur pose of these local alarindevices is to warn the occupants,- such interference of signals on theselocal devices will not be of any consequence. The main purpose has beenaccomplished, namely to call the fire brigade to station A and to soundall the local alarm devices. Of course, as soon as the general alarmdevices stop sounding the signal of stationA, the box at station B canagain be pulled, if desired, and its alarm will then be thegeneral'alarm devices and will be given accurately by'all of the localalarm devices. Thus when the system is in normal condition and one boxispulled before another, the box first pulled will control the a and, assoon as the box "he local devices the box last box signal on if, whenthe sys to together break the circuits time, the ho-i: rrst breakingclosing the F all the contact and m at the ot er box will then in closedp on by their to re, but the springs l togeth-er control the local alarmdevices and alarm devices will sound, almay not. give the signal oi'tlhis non-interference arrangesiinultaneous starting of boxes, tilrnderstood in the art.

' now to the abnormal condition l tent, as, when the system is to be 1it ctive testing or drilling, sup; pose time at, one of the boxes say attion. A--the switch. arms are moved into the second position intoengagement with contacts 2 and 5/, respectively.v For such setting ofthe switch mechanisms, pulling of the box will result in silencing ofthe gencral alarm devices and I'QSPOIlSt: of all the l local alarmdevicesto the signal of the box at station A. The silencing of thegeneral alarm devices is controlled by a circuit closed therethroughwhen the switch nit-chic nisms are moved to second position. suchsetting of the switch mechanism causing the closure of a short circuitpath about contact springs Z and m at station A by the conductor 20, theholding circuit being then, as fll0ws:-from battery S through thegeneral alarm devices G, conductor 8, switch arm and contact :2 atstation A, through short-circuiting conductor 20, through theielectro-magnet E at station A, then through i conductor ll to station Band through the springs Z and m and electro-magnet E at l l l l saidstation, thence through the springs Z and m and electromagnet at stationC, and

then through conductor 12 back to battery C The springs Z and m atstation A, al-

though opening and closing during opcra I tion of the signal wheel,are-ineffective and 3 the general alarm devices are silenced. but i thesprings 0 and 7) will control thelocal l alarm circuitand all the localalarm devices 9 will sound the signal ofthe box at station A, the localalarm devices being all in cluded serially in circuit with the batteryS. If, while the box at station A is operating to aelectively sound thelocal alarm devices, the box at station B, for example, is pulled for,an alarm of fire, this box at station B willimmediately assume controlof the nnlaliulann device mechanism circuit. his

l .ition two boxes are iiobvinuu for the reason that the springs ow/onesZ and m at station A, which normally by opening the general alarmcircuit would prevent the box at station E from taking control of thiscircuit, are shorbcircuited and thus unable to open the circuit so thatthe clectro-magnet at station B will remain energized and its associatedcontacts I and m will remain operative to control the general alarmcircuit, and the signal of box B will he sounded bv the general alarmmechanism and the fire brigade will be directed to station 13. Thesprings 0 and p at both boxes A and B will, however, be operating at thesame time for a period, but the local alarm devices. although perhapsnot correctly sounding the signal of either of the pulled 1', will,nevertheless, sound and warn the occupants. The fire alarm signal fromstation 15 thus takes precedence and the general alarm devices willsound the station ll signals and the signals cannot; in any wise beinterfered with by the box running at station A. I

If the switch mechanism at any station as, for exam ne, station A, movedto third i by the short-circuiliing by conductor 20 at station, A of thesignaling springsland m, and the silencing of the localalarm devicesoutside of station A is caused by the closure of a holding circuit, asfollo\vs:from battery 5 through conductor conductor 14,- and switch arm(5 and contact 3. at'station the resistance a; .at station A, conduc tor1!) to station ll, conductor 15 and springs o and p and the local alarmdevice at said station, then through conductors 18 and 15' to' station Cand through the springs 0 and 7) and localalarm device at said stationand then back through conductor 9 to battery At station A the resistancea: bridged by a circuit includin switch arm 6, conductor 15, springs 0an p, and the local alarm devices g. Now, as the box at station A runs,the general alarm mechanism circuit remains closed, as the springs l andm are short-circuited,'and the circuit including the local alarm devicesat stations.

B, C, etc., will remain closed and these local alarm devices will remainsilent. At station A, however, the current shunted from this closedcircuit about resistance 1' will be interrupted as the 5 rings 0 and 7)are opened and the local 3 arm device at station A will thereu on soundthe signal of the station box. I ,now, while the box at station A isoperating in the third position, the box at another station, saystatlonB, is pulled to sound an alarm of fire, this box will take immediatecontrol of the general alarm mechanism circuit and such control cannotbe interfered with by the operating has been mechanism at station A, andthe general alarm mechanism will sound the signal of the box at stationE and will dlrect the fire brigade to this station. The springs 0 and pat both stations A and B will, however,

together control the local alarm device circuit' alarm devices may ofthe box A'or B signals. they will, nevertheless, all sound to warn theoccupants. If, while any box at any station has the switch mechanism setto the second tion, but the box is not pulled, and then the boxatanother station is pulled, the box at this other station will ofcourse control both the general and local alarm device circuits and thebox signals will be given accurately on all the devices.

If it is desired to control only the tire brigade from any station, theswitch mechanism at this station set to the fourth position intoengagement with contacts 4 and 4. If this is done at station A forexample, the contact springs Z and m at this station will be free tocontrol the general alarm circuit and .to prevent interference with thegeneral alarm other box. However. at station A, the switch arm' 6.together with conductors 13. 16 and 17 and contact 4:, will form ashortcircuit path aboutfthe springs 0 and 79 so that these springs losecontrol of the local alarm derice circult and this circuit remainsclosed during operation of the box at station A. If, while the box atstation k'is operating under the fourth position setting, the box atanother station, say station B, is pulled for an alarmof lire, this ibox cannot take control of the general alarm mechanism circuit for thereason that this circuit is still controlled by. the springs Z and m. atstation A, so that the non-interference mechanism is efiective and thesignaling lever c at station B will be locked tohold its springs Z and mclosed as soon as the circuit is broken'at station A While the 'lever eat station B is operating on the test tooth of thesignal wheel. However,the springs 0 and 7) at station A being shortcircuited and inoperative,the springs 0 and p at station B will assume control of the local alarm.device circuit. and the station B signalwill he sounded on all of theselocal alarm device's. Vvhen the box at station A was set in operation tosend its signal through-thegeneral alarm mechanism circuit the firebrigade of course. responded and went to station A. The operator atstation A knows, of course, that for a brigade drill the local alarmdevices should not sound. and therefore immediately upon sounding, ofthe local alarm devices when the box at station B is pulled, theoperator at station A will know that an alarm of fire for a period andthough these local not clearly give either 5 or third posisignaling byany} and 2) sent in from station B and he will immediately direct thefire brigade to said sgiion. Thus the fire brigade will be accuratelydirected to the station sending in the fire alarm and all the localalarm devices will sound and will warn the occupants. and there is nointerference in signals. If the box at station B had been pulled forfire alarm after the switch mechani m at station A had been set to thefourth position, but before the box at station A. had been pulled, thenof course the box at \ltltlhll B would take control of the general alarmmechanism circuit. and the box B signal would be sounded on thegeneralalarm mechanisms and on all of the local alarm devices, and the box Awould be entirely locked out if pulled after pulling of the box atstation 13. Vhere the springs 0 at two boxes are operating at the sametime to open and close the local alarm device circuit, the local alarmdevices will re: spond to substantially all of the openings in thecircuit by each set of springs if a, closed signal wheel is used, andthe occppants will thus be thoroughly aroused.

I thus provide a very siniplesystem in which non-successive boxes can beeffectively utilized and which system, though designed primarily forfire alarm purposes, can be adjusted for testing and drill purposes andin which system the arrange ment is such that an alarm of fire cannot belost. nor can there be failure of all the local alarm devices to soundduring a fire alarm, so that the fire brigade will, under allcondit'ons, be accurately directed to the tire alarm sending station andall the occupants will be thoroughly alarmed; furthermore, such genera-lalarm signals can never be interfered with by other stations which areset for drilling or operating conditions or which are operating or setin operation after thus being set.

I do not, of course, desire to be limited to the precise constructionand operation which I have shown and described, as changes andmodifications are possible which would still come withinthe scope of theinvention, and

I therefore claim the following:

1. In a signaling system, the combination of a general alarm circuit anda local alarm circuit, a plurality of stations, circuit controllers ateach station in the general alarm and local alarm circuits respectively,a signal formulating mechanism at each station for operating bothcircuit controllers, and non-interference mechanism at each station forpreventing interference between signals 'hen the signal formulatingmechanisms at t a number of stations are operating at the same time, thegeneral alarm circuit controls lers only being subject to thenon-interference control of said mechanism, as set forth.

2. In a fire alarm system, the combination of a plurality ofnon-interference fire alarm signal boxes connected by two electriccircuits with a central station,fthe signaling mechanism of each of saidboxes including two circuit controllers, one in each circuit, means foroperating the same to send a box number signal over each circuit, analarm at the central station arranged in one of said circuits andsubject to control of the non interference mechanism of each signal box,an alarm associated with each box arranged in the other of said circuitsand independent of the control of said non-interference mech anism, andmeans at each local station for variably controlling the responsiveaction of the said alarm.

3. In a signaling system, the combination of a plurality of stations,each having signal formulating mechanism and local. alarm mechanism,general alarm mechanism, circuits for connecting said variousmechanisms, switch mechanism at each station adapted to adjust thecircuits to cause res onse of all the alarms or of the local a arms onlyupon actuation of the signal formulating mechanism, a non-interferenceelectro-magnet' and mechanism associated therewith at each station forpreventing interference between signals when the signal formulatingmechanisms at a number of stations are operating at the same time, thesaid non-interference mechanism being connected with and adapted toexercise control over the circuit including the general alarm mechanismonly.

4. In 'an alarm signaling system, the combination of a plurality ofstations, a fire alarm signaling box of the anon-interferingnon-successive type at each station, two sets of contacts and a signalwheel for actuating botli setsof contacts in each signal box, a mainalarm circuit including in series the non-interference mechanism and oneset of contacts controlled thereby at each station, a local alarmcircuit including in series an alarm device and the other set ofcontacts at each station, said contacts bein independent of the controlof the non-interference mechanism, as set forth.

5. In an alarm signaling system, the combination of a plurality ofstations, a noninterfering non'successive fire alarm box at each stationhaving two sets of circuit controlling contacts and one signal wheel foroperating both, a general alarm circuit including in series thenon-interference mechanisms and one set of circuit controlling contactscontrolled thereby at each station, a local alarm device at eachstation, a local alarm circuit including in series said local alarmdevices and a second set of circuit controlling contacts at eachstation, said contacts at each station acting independently of thenon-interference mechanism at said station.

6. In a fire alarm signaling system, the combination of a plurality ofstations, a general alarm circuit, a set of circuit controlling contactsat each station normally included in series in the general alarmcircuit, a local alarm device at each station, a local alarm circuitincluding normally in series all the local alarm devices, a second setof circuit controllin contacts at each station normally include in thelocal alarm circuit, non-interference mechanism at each stationincluding an electro-magnet, all of said magnets being connected inseries with the, general alarm circuit, said non-interference mechanismbeing associated with the general alarm circuit controlling contacts,means at each station for preventing noninterference control of thegeneral alarm circuit and means at each station for preventing controlof the local alarm circuit from said station.

7. In an alarm signalin system, the combination of a plurality 0stations, a signal box at each station. of the non-interferingnon-successive type, a non-interference electro-magnet, two sets ofcircuit controlling contacts and a signal wheel for actuating the samein each box, a main alarm circuit including in series thenon-interference magnets and one set of circuit controllin contacts ofthe several stations, the sai contacts being under the control of thenoninterference magnet at each station, a local alarm device at eachstation, a local alarm circuit including said local alarm devices andthe other set of contacts at each station normally in series, said localalarm circuit contacts being independent of the control of thenon-interference magnets, as set forth.

8. In an alarm signaling system, the com bination of a plurality ofstations, a fire alarm signaling box at each station of thenoninterfering non-successive type, a noninterference electro-magnet,two sets of circuit controlling contacts and a signal wheel foractuating the contacts in each box, a main alarm circuit including inseries the non-interference magnets and one set of circuit controllingcontacts of the several stations, the said contacts being under thecontrol of the non-interference magnets at each station, a local alarmdevice at each station,'a local alarm circuit including said local alarmdevices and the other set of contacts at each station normally 111series, said local alarm circuit contacts being independent of thecontrol of the non-intcrfcrcnce magnets, and switch mechanism at eachstation for preventing the control of the main circuit contacts by thenon-iuterference electro-magnets, as set forth.

9. In an alarm signaling system, the combination of a plurality ofstations, a fire alarm signaling box of,the non-interfering magnet ateach non-successive type at each station, a noninterferenceelectro-magnet, two sets of circuit controlling contacts and a signalwheel for actuating the contacts in each box, a mainalarm circuitincluding in series the non-interference magnets and one set of circuitcontrolling contacts of the several stations, the said contacts beingunder the control of the non-interference station, a local alarm deviceat each station, a local alarm circuit including said local alarmdevices and the other set of contacts ateach station normally in series,said local alarm circuit contacts being independent of the interferencemagnets,

and 'means at each station for shunting the main circuit contacts tothereby prevent the non-interference control by the electro-magnet atsaid station'of the main circuit.

10. In an alarm signaling system, the combination of a plurality ofstations, a sig naling box of the non-interfering non-successive type ateach station, two sets of circuit controlling contacts and a signalwheel for actuating both sets of contacts in each signal box, a mainalarm circuit including in-series the non-interference magnet and oneset of contacts controlled thereby at each station and also includinggeneral alarm mechanism and a source of current, a local alarm circuitincluding in series an alarm device and the other set of contacts ateach station and also including a source of current, said last namedcontacts being independent of the control of the non-interferencemechanism, means at each station for preventing non-interference controlof the main alarm circuit and means at each station for preventingcontrol of the local alarm circuit from said station.

1 In an alarm signaling system, the combination of a plurality ofstations, a signaling box of the non-interfering non-successive type ateach station, two sets of circuit controlling contacts and asignal wheelfor actuating. both ,sets of contacts in each signal box, a main alarmcircuit including in series the non-interference magnet and one set ofcontacts controlled thereby at each station and also including generalalarm mechanism and a source of current, a local alarm circuit lncludingin series an alarm device and the other set of contacts at each stationand also including a source of current, said last named contacts beingindependent of the control of the non-interference mechanism, and meansat each station adapted to adjust the circuits to cause response of allthe alarms or of the local alarms'only upon actuation of the signalwheel.

12. In an alarm signaling system, the combination of a plurality ofstations, a signaling box of the non-interfering non-sue control of thenon-' cessive type at each station, two sets of circuit controllingcontacts and a signal Wheel for actuating both sets of contacts in eachsignal box, a main alarm circuit including in series thenon-interference magnet and,

one set of contacts controlled thereby at each station and alsoincluding general alarm mechanism and a sourceof current,'a local alarmcircuit including inseries an alarm device and the other set of contactsat each station and also including a source I of current, said lastnamed contacts being independent of the control of the non-interferencemechanism, and 'means at each station for variably controlling theresponsive action of said alarms.

13. In an alarm signaling system, the combination of a plurality ofstations, a signaling box of the non-interfering nonsuccessive type ateach station, two sets of circuit controlling contacts and a signalwheel for actuating both sets of contacts in each signal box, a mainalarm circuit including in series the non-interference magnet and oneset of contacts controlled thereby at each station and also includinggeneral alarm mechanism and a source of current, and a local alarmcircuit including in series an alarm device and the other set ofcontacts at each station and also including a source of current, saidlast named contacts being independent of the control of thenon-interference mechanism.

14. In an alarm signaling system, the combination of a plurality ofstations, two sets of circuit controllers at each station, signalformulating mechanism at each station for operating both of said sets,"a main alarm circuit including general'alarm mechanism and a source ofcurrent and serially including one set of circuit controllers and anon-interference electro-magnet at each station, said circuitcontrollers being under' the control of said electro-magnet, and a localalarm circuit including a source of current and serially including theother set of circuit controllers and local alarm mechanism at eachstation, said last named circuit controllers not being under the controlof the electro-magnet.

15. In an alarm signalin system, the combination of a plurality0 stations, two

sets of circuit controllers at each station,

at each station, "said last named circuit controllers not being underthe control of the electro-ma et, and means at each station for variab ycontrolling the responsive action of said alarm mechanisms.

16. In an alarm signalin system, the combination of a plurality 0%stations, two sets of circuit controllers at each station, signalformulating mechanism at each station for operating both of said sets, amain alarm circuit including general alarm mechanism and a source ofcurrent and serially including one set of circuit controllers and anon-interference electro-magnet at each station, said circuitcontrollers" being under the control of said electro-magnet, a localalarm circuit including a source of current and seriall including theother set of circuit contro lers and local alarm mechanism at eachstation, said last named circuit controllers not being under the controlof the electro'magnet, and means at each station adapted to adjust thecircuits to cause res nse of all the alarm mechanisms or of e localalarm mechanism only upon actuation of the signal formulating mechanism.

17. In an alarm signaling system, the

when

tion for operating both of said sets, a main alarm circuit mcludlnggeneral alarm mechanism and a source of current and serially lncludingone set of circuit controllers and a non-lnterference electro-magnet ateach station, said circuit controllers being under the control of saidelectro magnet, a local alarm circuit including a source of current andserially including the other set of circuit, controllers and local alarmmechanism at each station, said last named circuit controllers not beingunder the control of the electro-magnet, means at each station forpreventing non-interference control of the main alarm circuit and meansat each station for preventing control of the local alarm circuit fromsaid station. n

In Witness whereof, I hereunto sul scribe my name this 30th day of AprilA. I). 1912.

CLARENCE E. BEACH. \Vitnesses H. l. Homox, I). \V. Fos'rsn.

